In either case, work is measured in units like foot*lbs. or N*m.
E=Mr for work around an axis of rotation
Power's SI unit of measurement is the Watt, representing the generation or absorption of energy at the rate of 1 Joule/sec. Power's unit of measurement in the English system is the horsepower, which is equivalent to 735.7 Watts.
For translational motions:
for rotational motions:
P = Fd/t
P = Mr/t
If, in the equation for rotational motion, which includes motion around a joint axis, we substitute:
so that JOINT POWER is the product of:
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